Bangladesh's arsenic woes are here to stay

时间：2019-03-02 01:05:04166网络整理admin

Hopes that the arsenic that contaminates well water in Bangladesh might naturally fall to safer levels were dashed this week with the discovery that the deep aquifers from which it is extracted receive an arsenic top-up every rainy season. Groundwater from deep “tube wells” has been widely used for drinking water in Bangladesh since the 1970s, but it has emerged more recently that naturally occurring arsenic taints the water in many of the country’s 10 million wells. A programme of testing wells and closing down those found to be tainted continues, but some 57 million Bangladeshis still drink water with unsafe arsenic levels,